Pin-tumbler vehicle-lock.



0. W. BOCHE.

PIN TUMBLER VEHICLE LOCK.

APPLICATION FILED Aue. l2. |913.

1,28*?,1 98. l Patented Dee. 1o, 1918;

' o'r'ro WILLIAM Boonic, cr'ivinnrnnn, CONNECTICUT.

rI-N-TUMBLER vnnicLE-Locx.

Specification of Letters Patent.

f Patented Dee. 1o, 191s.

Application filed August 12, 1918. Serial No. 249,450.

To all whom it may concern: n

Be it known that I, Oi'ro W. Bocas, a citizen of the United States, residing at Meriden, in the county of New Haven and State of Connecticut, have invented a new `and useful Improvement in Pin-Tumbler VVehicle-Locks; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in-

Figure 1 a side view of a pin tumbler lock constructed in accordance with my invention.

Fig. 2 a front view with the outer face plate of the lock removed with the parts in the unlocked position.

Fig. 3 a similar view with the parts in the locked position.

Fig. 4 a top or plan view with the top of the casing removed.

Fig. 5 a longitudinal sectional view through the key pinion and pin block on which it is mounted.

Fig. 6 a view of the inner end of the key adapted to operate the lock.

Fig. 7 a broken sectional view showing connection between the lock and a valve.

This invention relates t9 an improvement in pin tumbler locks particularly adapted for use in connection with tumblers for cutting ofi' and turning and locking in the closed position, a valve interposed in the fuel circuit, and also for making and breaking an electric circuit into the sparking device, the object being a simple arrangement of parts whereby these objects may be accomplished, and so that the driver of a car may safely leave it unattended; and the invention consists in a pin tumbler lock having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims.

In carrying out my invention, I employ a hub 10 formed on opposite sides with longitudinal grooves 11 and 12 and connected with a shaft 13 which extends through the rear of the lock casing 14 into engagement with a valve 42, of any approved construction, and located in a fuel supply pipe 43 so as to open or close that pipe. Fixed to the shaft 13 is a segmental gear 16 and meshing with this gear 16' is a key pinion 17 which is connected with a pin block 18 secured to theback 19 of the case by a key. post `20. In

the pin block 18 are a series of recesses 21 in whichare located locking-pins 22 which are normally thrown outward by springs 23. In the key pinion are locking-.pins 24, the

:reduced ends 25 of which are engaged by notches 27 formed in the outer face 'of the inner end 28 of a key 29, which key isalso provided with bits 30 to engage with tuinblers 31 which are pivotally mounted on a stud 32 and formed with clearance openings 33 larger in diameter than the diameter of the hub 10, and provided with inwardly projecting locking lugs 34 and 35 which in the proper position will engage with the notches 11 and 12 in the hub into which they are normally thrown by springse36. In the cas ing are lingers 37 and 38 so mounted as to stand in the path of one end 39 of the segmental rack 16, and so that when that rack is turned the end 39 passing between the contact fingers 37 and 38 will close a circuit through the wires 40 and 41 to the sparking device.

As shown in Fig. 1 of the drawings, the parts shown are in the locked position with the circuit broken and the valve in the fuel supply pipe closed. When the proper key is inserted into the lock, the key pins 24 will be forced inward to a proper distance to move the locking pins 22 out of engagement with the key pinion 17 so that the key pinion may be turned by the rotation of the key.

At the same time the key with the proper bittings, will move the tumblers so as to clear the locking lugs,l 34 and 35 from the notches 11 and 12 so as to permit the rack 16 and the shaft 13 to be turned. The turning of the shaft 13 opens the valve 42 in the fuel supply pipe 43, and on the completion of the rotation of the key the contact end 39 of the pinion will enter between the contact fingers 37 and 38 and close the circuit through the wires 40 and 41 to the sparking device, or to any electric circuit essential to the op-` eration of the car, the parts in this closed position being shown in Fig. 3. When the operator leaves the car the key is reversed in movement, returning the parts to the position shown in Fig. 2. It is apparent that by varying the lengths of the locking pins, key pins and bittings of the tumblers that a great variety of changes may be made so that the right key must be used to operate any particular lock.

It will be understood that my improved lock may be mounted in the dash" oi' fion't floor board, or othei1 point, as may be coiivenient for the paiticulai car to which it is applied.

I claim:-

1. A vehicle lock comprising a hub formed with longitudinal notches, tumbleis engag ing with said notches, a shaft on Which said hub is mounted, a segmental rack fixed to said shaft, a key pinion mounted adjacent to and co-acting With said rack, and means for locking said key pinion against rotation.

jsaid shaft, a. key pinion mounted adjacent to and (xo-acting with said rack, means for locking said key pinion against rotation, and a key adapted-V toV tui-n said key pinion and move the tumbleis out of engagement with said hub. Y

oTTo WiLLIAM BooHE.

Copies of this patent may be obtained for iive cents each, by addressing the Commissioner of Patents. n Washington, D. C. 

